148 The Philippine Journal of Science i9is 
C. Meian diameter of chlamydospores 38.98 mean ratio 
of length to width of conidia 1.47 10. P. fab'eri. 
BB. Chlamydospores small, mean diameter less than 35 m. 
C. Mean diameter of chlamydospores 32.89 mean ratio 
of length to width of conidia 1.28.. ..11. P. jatrophae. 
SUMMARY 
1. Enormous losses, amounting to thousands of pesos each 
year, are produced by coconut bud rot. As shown by the Bu- 
reau of Agriculture reports, the disease is most prevalent in 
Laguna, Tayabas, Pangasinan, and Zamboanga Provinces. It 
is most abundant in very humid sections and in thickly planted 
groves, both of which conditions are found on the slopes of 
Mount Banahao. Field studies show that the spread may be 
extremely rapid during favorable weather. 
2. An organism similar to Bacillus coli (Escherich) Mig., 
and other saprophytic bacteria are associated with the disease. 
Under certain conditions, such as a host weakened by severe 
injury, the former organism and Bacillus coli (Escherich) Mig. 
isolated from man or horse, may in inoculation experiments 
produce disease. 
3. A summary of the entire bacteriological work done by the 
present writer, including approximately three hundred inocu- 
lations, has indicated that, while the bacteria are always present 
and are a factor in destroying the weakened tissues, they can- 
not account for the initiation of the disease or its prevalence 
and rapid spread. 
4. Phytophthora faberi Maubl. isolated from cacao produces 
a typical bud rot of coconut seedlings and of mature coconut 
trees. 
5. A fungus isolated from a typical field case of coconut bud 
rot was found to be identical with the Phytophthora faberi 
Maubl. isolated from cacao. 
6. Phytophthora faberi Maubl. isolated from the field case 
of coconut bud rot produced in all inoculated seedlings a typical 
infection. 
7. Phytophthora faberi Maubl. isolated from the field case 
of coconut bud rot produced disease in coconut seedlings, cacao 
fruit, Hevea rubber seedlings, and papaya fruit. The same 
species of fungus isolated from cacao fruit produced disease in 
coconut seedlings and mature trees, cacao fruit and stem, Hevea 
rubber seedlings and mature trees, and papaya fruit. 
8. A morphologic and taxonomic study of the organism isolated 
from coconut has proved that it is Phytophthora faberi Maubl., 
as described by Rosenbaum. (lO) 
